Resilient tire



c. JRQENSEN AND G. A. nuNn/mRE. RESILIENT TIRE.

APPLICATION FILIII APR. 22| I9IB.

1I 94039085., Patented Jan. III, 1922,

2 SHEETS-SHEET I- 0.1RGENSEN AND G. A. DUNMORE.

, RESILIENT TIRE.

APPLICATION HLED APR.22.191B.

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CHARLES JEGENSEN MTD GEORG-E A. DUNMORE, @F MONTREAL, QUEBEC, CMIADA.

RESILIENT TIRE.

Specification of Letters Patent.

Patented Jan. in, i922?.

Application led. April 22, 1918. Serial No. 230,176.

To all whom t may concern:

Be it known that we, CHARLES JRoENsnN, a citizen ofthe United States,residing at Montreal West, Quebec, Canada, and GEORGE A. DUNMonE, acitizen of the United States, residing' at Montreal, Quebec, Canada,have invented certain new and useful Improvements in Resilient Tires, ofwhich the following is a specification.

Our invention relates to resilient tires, and the object of ourinvention is to provide a tire which shall possess as much resiliency asthe ordinary pneumatic tire and not be a subject to their disadvantagessuch as punctures, blowsouts, etc. A further object of the invention isto provide a tire, as mentionedl including an outer tube or shoe, whichshall, if desired, be of the usual form, and which may be readilyattached to and detached from any Wheel constructed for use withdemountable rims. @ther objects will appear hereinafter.

`l/Vith these objects in view our invention consists generally in a tireshoe and an insert for the same replacing the usual inner tube andcomprising a helically coiled spring member and means for securing thesame in position. Our invention further consists in a tire as mentionedin which the spring member is formed of a plurality of sections. Ourinvention further consists in a device as mentioned in which the innerportions of the several convolutions of the spring member are heldbetween inner and outer clamping members which are preferably secured tothe rim. Our invention further consists in a device as mentionedcharacterized by ears formed on the ends of the spring sections andarranged within recesses in one of the clamping members. Our inventionfurther consists in various details of construction and arrangements ofparts all as will be fully described hereinafter and particularlypointed out in the claims.

@ur invention will be more readily understood by reference to theaccompanying drawings forming a part of this specification and in which:

F ig. l is a side elevation, partially in section, of a wheel equippedwith a tire embodying our invention,

Fig. 2 is a perspective view of one of the spring insert sections,

Fig. 3 is an enlarged transverse section on the line 3 3 of Fig. l,

Fig. fi is a view similar to Fig. 3 illustrating a modified form, and

Figs. 5 and 6 are perspective views of the inner and outer clampingmembers respectively.

Referring now to drawings l indicates a vehicle wheel of which 2 is thefelly and 3 the fixed rim. 4 indicates a demountable rim held in placeby a ring 5 and a plurality of bolts 6. The portions of the device sofar mentioned may be of any ordinary or preferable form.

Arranged upon the rim a is a tire shoe 7 held in place by the usualrings. The tire shoe 7 is preferably of the ordinary form, but it willbe obvious, as the description proceeds that other forms of shoes may beem ployed without departing from our invention. Arranged within the shoe2, and replacing the usual inner or pneumatic tube, is the resilientinsert 8, comprising a. heli cally coiled spring member. This is formedof a strip of flat spring steel coiled to the proper diameter to litsnugly within the shoe, the breadth and gage of said strip varying withthe weight of the vehicle upon which the tire is to be used. This insertis preferably formed of a plurality of sections 8, one of which isillustrated in Fig. 2, and arranged end to end to completely fill theshoe 7.

Suitable means are provided for holding the several sections of theinsert in position. This comprises inner and outer clamping members 9and 10, respectively, between which the inner portions of the severalconvolutions of the members 8 are securely held. The clamping members 9and l() are each formed of several sections, 9 and 10 respectively, tofacilitate assembling the device, Figs. 5 and 6 illustrating one sectionof each member. The inner faces l1 of the sections of the inner member 9are formed to [it snugly on the periphery of the rim. 4;, and thesections 9 are secured to the rim by a plurality of screws 12. The outerface of the member 9 is concave transversely to conform to the shape ofthe spring members 8. The outer member 10 is preferably rolled from asteel plate to conform to the shape of the resilient insert, and bolts13 are provided to securely clamp the members 9 and 10 together, withthe adjacent portions of the insert between, as clearly illustrated inFig. 3 of the drawings. The bolts arranged at approximately midway ofthe' length ot the spring sections as indicated.

ln order to hold the ends of the sections 8 in position, and to preventundue expansion and contraction of the sections, the ends of the stripof which each section 8 is "formed are bent outwardly forming lugs 15which are arranged in a recess 16 formed in the clamping member 9, saidrecess preferably comprising an annular groove in the outer face of saidmember. l' In Fig. l of the drawings we have illusv trated a slightlymodiiied form otthe invention which is adapted for use upony heavyvehicles. In this form we arrange within the primary springinsert 8 asimilar secondary insert 17 held in place by an additional clampingmember 18 similar to theclamping member 10. The auxiliary insert 17 thusconstitutes a buffer member giving additional strength` to the deviceforl heavy vehicles.

It is obvious that a tire ot the construction above described possessesas much resiliency as the ordinary pneumatic tire, and that the same isnot subject to the same disadvantages oi puncture and blow-out as thelatter. Also should an accidentv occur to either the tire shoe or theinsert the de-V vice may be readily removed from the wheel nation withan insert formed of a pluralityl of similar sections, each sectioncomprising` aV helically coiled member and inner and outer clampingmembers secured to said rim, and securing a portion of each convolutionof the insert members therebetween, the ends of said helically coiledmembers being bent outwardlyforming ears, andone of the clamping membersbeing provided with means to receive said ears.

2. In a device of the class described a rixn and a tire shoe thereon incombination with an insert comprising a vplurality of similar sectionseach formed or a strip of resilient material bent into helical form,in-` ner and outer clamping members secured together and securing aportion of each convolution ot said insert between them, said innerclamping member beingsecured to said rim, each of said insert sectionsbeing provided with an aperture inV one of the convolutionssubstantially .midway of the length thereof, a bolt passing through saidclamping members and said aperture, and

cooperatingvineans on the ends of said sectionsand one of said clampingmembers for holding said ends in positiomsubstantially as described.v

3. ln a ydevice of the class described, a wheel rim and a tire shoethereon in coinbination with an-insert formed ot' a plurality of similarsections, each section comprising `ahelicallycoilediifiember` and innerand outer clamping members each being formedV of' a plurality of similarsections, and means for clamping `said memberstogether.7 substantiallyas described.

" 4. ln'adevice o't the class described, a

tire shoe f and an'insert 'for the sainecoinprising strips of resilientvmaterial V.bent into helical form, means for clamping the sameinfposition, abutlier member arranged within said insertandformedofstiips or resilient material bent finto helical term,

Vmeans forclamping. said` buier member in ]aosition., said insertandfsaid butler member each formed ofv a plurality ot' rsimilarvnon-interlocking Vsections arranged end to end, substantially asdescribed.- l

Intestiniony whereof we have signed our names ,to this speciti'cationinthe presence` ot two subscribing witnesses.

" CHARLES JRGENSEN.

y GERGE A. DUNMORE.

Witnesses: p YVETTE TRUDEAU, Y STUART N. RossiiN.

